problem updating iphone 4s to ios9

I updated my iphone 4s to ios8.4.1 and my mail app quit working. Apprehensive about update 9 I decided to take a chance and update my iphone hoping it would fix my mail. Now my CALENDER DOESN't WORK! And this new leasing program Apple is trying to push. I hope it backfires big time. Fix my mail and my calender, because YOU broke it.

Uupdate iPhone 4s to iOs9

First findings :

- No shortcut menu by sliding the Home screen on the side,

- No contact photo in the Messages application,

- No scroll bar in the Photos application,

- No indication of battery in the notifications screen,

- (?) Bug in Calendar : in the month view, touch one day does not display the corresponding day-screen ...

iPhone 4S, iOs 9